Permeability Testing

Permeability testing consists of determining the volume of water passing through a specimen in a known time, under known conditions of effective stress and hydraulic gradient. The two methods in common use in the UK are the BS 1377 : Part 6 method, where the permeability stage is preceded by saturation and consolidation stages, and the Environment Agency accelerated method.

Type of test / Properties measured / Range of measurement	Standard Specifications
Moisture content - oven drying method	BS 1377-2
Density - linear measurement	BS 1377-2
Permeability in a triaxial cell	BS 1377-6
Determination of the permeability of clayey soils in a triaxial cell using the accelerated permeability test	Environment Agency R & D Technical Report P1-398/TR/2

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